<%--
  Created by IntelliJ IDEA.
  User: 给
  Date: 2020/12/2
  Time: 18:46
  To change this template use File | Settings | File Templates.
--%>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<%@ page import="java.sql.PreparedStatement" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
    //加载数据库驱动
    Class.forName("com.mysql.jdbc.Driver");

    //建立数据库连接
    String url = "jdbc:mysql://localhost:3306/book"; //数据库连接地址
    Connection connection = DriverManager.getConnection(url,"root","root"); //第一个root为数据库的用户名  第二个root为数据库的密码

    String sql = "delete from user where id = ?"; //在PreparedStatement 中使用问好代替实际参数
    PreparedStatement ps = connection.prepareStatement(sql);

    int id = Integer.parseInt(request.getParameter("id"));

    ps.setInt(1,id);

    int count = ps.executeUpdate();

    if(count > 0){
        out.print("删除成功");
    }else{
        out.print("删除失败");
    }
%>
